Ralph Nelson Director Rock Hudson Dr. Paul Holliston Actor Barbara Carrera Victoria Spencer Actor Diane Ladd Martha Douglas Actor Roddy McDowall Frank Riley Actor Anne Schedeen Helen Holliston Actor John Elerick Gordon Holliston Actor Jack Colvin Dr. Jim Winston Actor Vincent Bagetta Collier Actor Joyce Spitz Trainer Actor Dick Winslowe John Forbes Actor Lina Raymond Janet Novak Actor Dr. Joyce Brothers Self Anita Doohan Screenwriter, Producer Jack W. Thomas Screenwriter Arnold H. Orgolini Producer Fred J. Koenekamp Cinematographer John A. Martinelli Film Editing Gil Mellé Original Music Joe Alves Production Design Phil Abramson Set Decoration Moss Mabry Costume Design Lea Stalmaster Casting